A Spectral Approach to the Dynamic Instability Analysis in Earthquake Resistant Design

抗震设计中动态失稳分析的谱法

• 批准号: 8708707
• 负责人: Dionisio Bernal
• 金额: $ 6万
• 依托单位: Northeastern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-07-01 至 1989-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8708707&HistoricalAwards=false
• 关键词: Spectral; Approach; Dynamic; Instability; Analysis

The design of a structure for earthquake resistance includes consideration of the interaction between gravity loads and lateral displacements. This interaction, known as the P-Delta effect, refers to a tendency for unidirectional yielding of the structure, which can lead to dynamic instability and collapse of the structure. A methodology to consider P-Delta effects in the design of seismic resistant structures is lacking. The objective of this research is to develop such a methodology to consider the P-Delta effect and dynamic instability. The approach is based on the definition of the inelastic spectrum. The premise is that P-Delta effects can be included through spectrum modification, in a way that is similar to the methods used to incorporate the effects of ductility and damping.

抗震结构的设计包括考虑重力荷载和侧向位移之间的相互作用。这种相互作用被称为P-Delta效应，指的是结构单向屈服的趋势，这可能导致结构的动力失稳和倒塌。在抗震结构的设计中，缺乏考虑P-Delta效应的方法。这项研究的目的是开发一种考虑P-Delta效应和动态不稳定性的方法。该方法基于非弹性谱的定义。前提是P-Delta效应可以通过频谱修改来计入，其方式类似于用于计入延性和阻尼性效应的方法。